Malicious PDF — malware analysis report

Static analysis result for SHA-256 714a494160203f60…

MALICIOUS

PDF

75.8 KB Created: 2021-03-21 07:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eded258a79618f8c41be7ecaf5e2fe9f SHA-1: ceb8980c65b26e7f19d65f465cb0357d61cedc4c SHA-256: 714a494160203f602c8d3ff3a22cd42756b935f74a845158a7061c2fb0c90161
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'smart wristband manual'. The presence of external URIs and link farms indicates an attempt to redirect the user to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/strik?utm_term=smart+wristband+4+manual+espa%25C3%25B1ol PDF link annotation
    • http://jovefupe.mywebcommunity.org/how_to_stop_a_kidde_carbon_monoxide_alarm_from_beeping.pdfIn PDF document text
    • https://cdn.sqhk.co/zimogemage/k2PF7mM/84658601318.pdfIn PDF document text
    • http://copyright-supporthelp.com/1278855713rfu14.pdfIn PDF document text
    • http://sollabs.xyz/49625138031pjff2.pdfIn PDF document text
    • https://xajomorunineg.weebly.com/uploads/1/3/1/3/131383441/givanojefubapexupoze.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/dVdizid/yeet_definition_dictionary.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/1570086.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/hMUji92/the_gift_cash_cash_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/ibU2jhu/color_shift_glitter_bulk.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/7735426.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c52a20b-7707-49c8-96db-3560780b3fd2/what_is_the_best_travel_water_flosser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acd49c2-0171-41aa-8a42-9b938111eac5/john_paul_jackson_dreams_and_mysteries_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c589309-1de1-4c26-8160-ee79319cda4f/writing_with_style_trimble_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/vidodudowerivuxiwuxef.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/biology_textbook_class_12_gseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9264ee-1d92-4b20-b195-d99d741e5ed2/1_what_is_the_normal_boiling_point_of_ethanol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf18f59d-e6ce-4155-bf2f-a4dd6481a29b/94493952440.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/xemukuxorejuz.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/32631877529.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58F 5740 bytes
SHA-256: 7b37ba37d207005b5ed5871763c10d2176f26aa8e9f30d241a1749b383f799c8
font_01_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 12112 bytes
SHA-256: 8473ba42ad0348520146112108d44350db9c9fefd854d49f18f70d4e0994f259